ASTROPHYSICS AT HRI


Recent Publications:


You will find here a list of papers written by members at HRI since we started keeping a record in 2004. Papers are listed in the reverse chronological order. Names of authors from HRI are highlighted in bold letters. We have also listed papers written at HRI by students, visitors and post-doctoral fellows during their stint here.


  1. Sonali Saha, Sharmistha Sen, Sankhasubhra Nag, Suparna Roychowdhury, Tapas K Das, 2015, New Astronomy 43, 10, arxiv: 1501.00284 Model dependence of the multi-transonic behavior, stability properties and corresponding acoustic geometry for accretion onto a spinning black hole .

  2. Deepika B. Ananda, Sourav Bhattacharya, Tapas K Das, 2015, Proc. Indian Natn. Sci. Acad 81, 244, arxiv: 1406.3697 On the realizability of relativistic acoustic geometry under a generalized perturbation scheme for axisymmetric matter flow onto black holes .

  3. Sankhasubhra Nag, Deepika B Ananda, Ishita Maity, Tapas K Das, 2014, Proc. Indian Natl. Sci. Acad. 81, 1, 267, arxiv: 1406.3707 Development of Secular Instability in Different Disc Models of Black Hole Accretion .

  4. Deepika B. Ananda, Sourav Bhattacharya, Tapas K Das, 2014, arxiv: 1407.2268 Emergent acoustic causality and stability analysis for axisymmetric flows through perturbation of mass accretion rate .

  5. Deepika B. Ananda, Sourav Bhattacharya, Tapas K Das, 2014, General Relativity and Gravitation 47, article id. #96, 20 pp, arxiv: 1406.4262 Acoustic geometry through perturbation of mass accretion rate - radial flow in static spacetimes.

  6. Pratik Tarafdar, Tapas K Das, 2014, Accepted for publication in IJMPD, arxiv: 1305.7134 Dependence of acoustic surface gravity on geometric configuration of matter for axially symmetric background flows in the Schwarzschild metric.

  7. Neven Bilic, Arpita Choudhary, Tapas K Das, Sankha Subhra Nag, 2014, Class. Quant. Grav. 31, 035002, arxiv: 1205.5506 The role of axisymmetric flow configuration in the estimation of the analogue surface gravity and related Hawking like temperature.

  8. Bozena Czerny, Devaky Kunneriath, Vladimir Karas, Tapas K Das, 2013, Astronomy and Astrophysics 555, id. A97, arxiv: 1306.0900 Multiple accretion events as a trigger for Sgr A* activity .

  9. Bozena Czerny, Vladimir Karas, Devaky Kunneriath, Tapas K Das, 2012, To appear inPproceedings of IAUS 290 "Feeding Compact Objects: Accretion on All Scales", arxiv: 1211.1226 Mini-spiral as source of material for Sgr A* in bright state.

  10. Sourav Bhattacharya, Amitabha Lahiri, 2012, Phys. Rev. D 86, 084038, arXiv: 1208.4470 Massive spin-2 and spin-1/2 no hair theorems for stationary axisymmetric black holes.

  11. Hung-Yi Pu, Ishita Maity, Tapas K Das, Hsiang-Kuang Chang, 2012, Class. Quant. Grav. 29, 245020, arXiv: 1204.1347 On spin dependence of relativistic acoustic geometry.

  12. Shilpi Agarwal, Tapas K Das, Rukmini Dey, Sankha Subhra Nag, 2012, Gen. Rel. Grav. 44, 1637, arXiv: 1204.0789 An analytical study on the multi-critical behaviour and related bifurcation phenomena for relativistic black hole accretion.

  13. Bozena Czerny, Pawel Lachowicz, Michal Dovciak, Vladimir Karas, Tomas Pechacek, Tapas K Das, 2012, Journal of Physics: Conference Series 372, Issue 1, id. 012055, arXiv: 1202.2087 QPO in RE J1034+396: model constraints from observed trends.

  14. Tapas Kumar Das, Bozena Czerny, 2012, Mon. Not. R. Astron. Soc. 421, L24 arXiv: 1109.4149 On the efficiency of the Blandford-Znajek mechanism for low angular momentum relativistic accretion.

  15. Sudipta Das and Narayan Banerjee 2012, Int. J. Theor. Phys. 51, 2771, arXiv:0806.3666 Can neutrino viscosity drive the late time cosmic acceleration?

  16. Das, Tapas K. and Czerny, Bozena, 2012, New Astronomy 17, Issue 3, 254, arXiv: 0906.4559 Hysteresis effects and diagnostics of the shock formation in low angular momentum axisymmetric accretion in the Kerr metric

  17. Rajeev Kumar Jain, Pravabati Chingangbam, and L. Sriramkumar, 2011, Nucl. Phys. B 852, 366, arXiv:0902.1067 Reheating in tachyonic inflationary models: Effects on the large scale curvature perturbations.

  18. S. Gutti, S. Kulkarni, L. Sriramkumar, 2011, Phys. Rev. D 83, 064011, arXiv: 1005.1807 Modified dispersion relations and the response of the rotating Unruh-DeWitt detector.

  19. Tapas Kumar Das, Bozena Czerny, 2011, Mon. Not. R. Astron. Soc. 414, 627, arXiv: 1009.3615 Modeling the time-resolved quasi-periodic oscillations in AGNs.

  20. S. Nag, S. Acharya, Arnab K. Ray Tapas Kumar Das, 2012, New Astronomy 17, 285, arXiv: 1010.5592 The role of flow geometry in influencing the stability criteria for low angular momentum axisymmetric black hole accretion.

  21. B. Czerny, P. Lachowicz, M. Doviciak, V. Karas, T. Pechacek, Tapas Kumar Das, 2010, A&A 524, A26, arXiv: 1009.3126 The model constraints from the observed trends for the quasi-periodic oscillation in RE J1034+396.

  22. Sushan Konar, 2010, Mon. Not. R. Astron. Soc. 409, 259, arXiv: 1007.1456 The Magnetic Fields of Millisecond Pulsars in Globular Clusters.

  23. D. K. Hazra, M. aich, R. K. Jain, L. Sriramkumar, 2010, JCAP 1010, 008, arXiv: 1005.2175 Primordial features due to a step in the inflaton potential.

  24. D. Kothawala, S. Shankaranarayanan and L. Sriramkumar, 2010, To appear in the proceedings of Conference: 12th Marcel Grossmann Meeting on General Relativity (MG 12), 12-18 Jul 2009, Paris, France, arXiv:1002.1132 Quantum gravitational corrections to the propagator in spacetimes with constant curvature.

  25. Bagla J. S., Khandai Nishikanta, and Kanan K. Datta, 2010, Mon. Not. Roy. Astron. Soc. 407, 567, arXiv: 0908.3796 HI as a Probe of the Large Scale Structure in the Post-Reionization Universe.

  26. S. Unnikrishnan and L. Sriramkumar, 2010, Phys. Rev. D 81, 103511, arXiv: 1002.0820v2 A note on perfect scalar fields.

  27. Jassal H. K., Bagla J. S., and Padmanabhan T., 2010, Mon. Not. Roy. Astron. Soc. 405, 2639, arXiv: astro-ph/0601389 Understanding the origin of CMB constraints on dark energy.

  28. Jaswant K. Yadav, J. S. Bagla, and Nishikanta Khandai, 2010, Mon. Not. Roy. Astron. Soc. 405, 2009, arXiv: 1001.0617 Fractal Dimension as a measure of the scale of Homogeneity.

  29. Anne Franzen,Sashideep Gutti, and Claus Kiefer, 2010, Class. Quant. Grav. 27, 015011, arXiv: 0908.3570 Quantum Gravitational Collapse in the Lemaitre-Tolman-Bondi Model with a Positive Cosmological Constant.

  30. Jassal H. K., Bagla J. S. and Padmanabhan T. 2010, Mon.Not.Roy.Astron.Soc. 405, 2639, astro-ph/0601389 The Vanishing Phantom Menace.

  31. Rajeev Kumar Jain, Pravabati Chingangbam, L. Sriramkumar, and Tarun Souradeep, 2010, Phys. Rev. D 82, 023509, arXiv: 0904.2518 [astro-ph.CO] The tensor-to-scalar ratio in punctuated inflation.

  32. S. Inoue, R. Salvaterra, T. Roy Choudhury, A. Ferrara, B. Ciardi, and R. Schneider, 2010, Mon. Not. R. Astron. Soc. 404, 4, arXiv: 0906.2495 Probing intergalactic radiation fields during cosmic reionization through gamma-ray absorption

  33. H. K. Jassal, 2010, Phys. Rev. D 81, 083513, arXiv: 0910.1906 Evolution of perturbations in distinct classes of canonical scalar field models of dark energy.

  34. Khandai Nishikanta, Datta Kanan K., and Bagla J. S., 2009, Accepted for publication in the Mon. Not. R. Astron. Soc., arXiv: 0908.3857 HI as a Probe of the Large Scale Structure in the Post-Reionization Universe: Visibility Correlations and Prospects for Detection.

  35. Bagla J. S., Khandai Nishikanta, and Kulkarni Girish, 2009, arXiv: 0908.2702 Mass function of haloes: scale invariant models.

  36. Agarwal, Shilpi., Das, Tapas K. and Dey, Rukmini, 2009, arXiv: 0907.4754 Transonicity in black hole accretion -- A mathematical study using the generalized Sturm chains

  37. T. Roy Choudhury , 2009, Curr. Sci. 97, 841, arXiv: 0904.4596 Analytical Models of the Intergalactic Medium and Reionization.

  38. L. Sriramkumar , 2009, arXiv: 0904.4584v1 [astro-ph.CO] An introduction to inflation and cosmological perturbation theory.

  39. Kanan K. Datta, Somnath Bharadwaj, and T. Roy Choudhury, 2009, Mon. Not. R. Astron. Soc. 399, L132, arXiv: 0906.0360 The optimal redshift for detecting ionized bubbles in HI 21-cm maps.

  40. Bagla J. S. , Loeb A., 2009, Submitted to MNRAS, arXiv: 0905.1698 The hyperfine transition of 3He II as a probe of the inter-galactic medium.

  41. Raka Dona Ray Mandal, Sushan Konar, Mira Dey, Jishnu Dey, 2009, Mon. Not. R. Astron. Soc. 399, 822, arXiv: 0904.4559 The micro-glitch in PSR B1821-24 : A case for the strange pulsar?

  42. D. Kothawala, L. Sriramkumar, S. Shankaranarayanan and T. Padmanabhan, 2009, Phys. Rev. D 80, 044005, arXiv: 0904.3217 Path integral duality modified propagators in spacetimes with constant curvature.

  43. J. S. Bagla, 2009, Resonance 14, 216, arXiv: 0904.2633Hubble, Hubble.s Law and the Expanding Universe.

  44. H.K. Jassal, 2009, Phys. Rev. D 79, 127301, arXiv: 0903.5370 A comparison of perturbations in fluid and scalar field models of dark energy.

  45. Paramita Barai, Ipsita Chakraborty, Tapas K Das, and Paul J Witta, 2009, arXiv: 0902.4093 Behaviour of relativistic black hole accretion sufficiently close to the horizon.

  46. J. S. Bagla, Girish Kulkarni, and T. Padmanabhan, 2009, Mon. Not. Roy. Astron. Soc. 397, 971, arXiv: 0902.0853 Metal enrichment and reionization constraints on early star formation.

  47. Anjan A Sen, Gaveshna Gupta and Sudipta Das 2009, JCAP 0909, 027, arXiv: 0901.0173Non-Minimal Quintessence with Nearly Flat Potential

  48. Tapas K Das, Jayanta K. Bhattacharjee, Atri Bhattacharya, and Arnab K.Ray, 2009, Mon. Not. Roy. Astron. Soc. 398, 841, arXiv: 0812.4793 Quasi-viscous accretion flow -- I: Equilibrium conditions and asymptotic behaviour.

  49. Jinn-Ouk Gong 2009, Phys. Rev. D 79, 063520, arXiv: 0710.3835 A new consistency relation from the running of the tensor-to-scalar ratio.

  50. Shrirang S. Deshingkar 2009, Int. J. Mod. Phys. D 18, 2083, arXiv: 0710.1866 Can we see naked singularities?

  51. Rajeev Kumar Jain, Pravabati Chingangbam, Jinn-Ouk Gong, L.Sriramkumar and Tarun Souradeep 2009, JCAP 0901, 009 , arXiv: 0809.3915 [astro-ph] Punctuated inflation and the low CMB multipoles

  52. Sanil Unnikrishnan, H.K. Jassal and T.R. Seshadri 2008, Phys. Rev. D 78, 123504, arXiv: 0801.2017 Scalar Field Dark energy Perturbations and their Scale Dependence.

  53. J. S. Bagla and Nishikanta Khandai 2008, Mon. Not. Roy. Astron. Soc. 396, 2211, arXiv: 0811.4228 The Adaptive TreePM: An Adaptive Resolution Code for Cosmological N-body Simulations

  54. Nishikanta Khandai and J. S. Bagla 2008, Res. Astron. Astrophys. \ 9, 861, arxiv: 0802.3215 A Modified TreePM Code.

  55. J. S. Bagla and Jayanti Prasad 2008, Mon. Not. Roy. Astron. Soc. 393, 607, arxiv: 0802.2796 Gravitational collapse in an expanding background and the role of substructure II: Excess power at small scales and its effect of collapse of structures at larger scales.

  56. Jinn-Ouk Gong and Seong Chan Park 2008, arxiv: 0801.0333v1 Minimal gauge inflation.

  57. Dawood A. Kothawala, S. Shankaranarayanan and L. Sriramkumar 2008, JHEP 0809, 095, arxiv: 0801.0225 Quantum gravitational corrections to the stress-energy tensor around the BTZ black hole.

  58. Nabamita Banerjee, Rajeev Kumar Jain and Dileep P. Jatkar 2008, Gen.Rel.Grav. 40, 93, hep-th/0610109 Non-Gravitating Scalar Field in the FRW Background.

  59. Sudipta Sarkar, S. Shankaranarayanan and L. Sriramkumar 2008, Phys. Rev. D 78, 024003, arxiv: 0710.2013 Sub-leading contributions to the black hole entropy in the brick wall approach.

  60. Jinn-Ouk Gong and Narendra Sahu 2008, Phys.Rev. D 77, 023517, arxiv: 0705.0068 Inflation by a spontaneous parity breaking field and consequences for nu-masses and B-Asymmetry.

  61. J. S. Bagla, Jaswant Yadav and T. R. Seshadri 2007, Mon. Not. Roy. Astron. Soc. 390, 829, arxiv: 0712.2905 Fractal Dimensions of a Weakly Clustered Distribution and the Scale of Homogeneity.

  62. B. Czerny, M. Moscibrodzka, D. Proga, T. Das, and A. Siemiginowska, 2007, To appear in the proceedings of Conference: Workshop on Black Holes and Neutron Stars, 19-21 Sep 2007, Opava, Czech Republic, arxiv: 0710.2426 Low angular momentum accretion flow model of Sgr A* activity

  63. Rajeev Kumar Jain, Pravabati Chingangbam and L. Sriramkumar 2007, JCAP 0710, 003 ,astro-ph/0703762 On the Evolution of tachyonic perturbations at super-Hubble scales.

  64. Sanghamitra Goswami, Saba Nashreen Khan, Arnab K. Ray, and Tapas Kumar Das 2007, Mon. Not. Roy. Astron. Soc. 378, 1407, astro-ph/0703162 Axisymmetric black hole accretion in the Kerr metric as an autonomous dynamical system

  65. Jayanti Prasad 2007, J. Astrophys. Astron. 28, 117, astro-ph/0702557 Effects of finite box size in cosmological N-body simulations II : Halo formation and destruction rates.

  66. Jinn-Ouk Gong 2007, Phys.Lett.B 657, 165, arxiv: 0706.3599 Generation of perturbation after multi-field inflation.

  67. Tapas Kumar Das, Neven Bilic, and Surajit Dasgupta, 2007, JCAP 0706, 009, astro-ph/0604477 A black-hole accretion disc as an analogue gravity model.

  68. Tapas Kumar Das, 2007, arxiv: 0704.3618 Astrophysical Accretion as an Analogue Gravity Phenomena

  69. H. K. Jassal and L. Sriramkumar 2007, Class. Quantum Grav. 24 2589, gr-qc/0611102 Entropy of BTZ black strings in the brick wall approach.

  70. Tapas Kumar Das 2007, arxiv: 0704.3618v1 Astrophysical Accretion as an Analogue Gravity Phenomena.

  71. Ipsita Mandal, Arnab K. Ray, and Tapas Kumar Das 2007, Mon.Not.Roy.Astron.Soc. 378, 1400, astro-ph/0702733Critical properties of spherically symmetric black hole accretion in Schwarzschild geometry.

  72. Ki-Young Choi and Jinn-Ouk Gong 2007, JCAP 0706, 007, arxiv: 0704.2939v1 Multiple scalar particle decay and perturbation generation.

  73. Ray Arnab K. and Bhattacharjee J. K. 2007, Physics Letters A 371, 241, cond-mat/0409315, A Time-dependent study in the shallow water approach to the circular hydrolic jump.

  74. Das Tapas Kumar, Bilic Neven, Dasgupta Surajit 2007, JCAP 0706, 009, astro-ph/0604477 Black-Hole Accretion Disc as an Analogue Gravity Model.

  75. L. Sriramkumar and S. Shankaranarayanan 2006, JHEP 0610, 050, hep-th/0608224 Path integral duality and Planck scale corrections to the primordial spectrum in exponential inflation.

  76. Shrirang S. Deshingkar 2006, gr-qc/0609052 Accurate extraction of the News.

  77. Soumini Chaudhury, Arnab K. Ray and Tapas Kumar Das 2006, astro-ph/0607451 Critical properties and stability of stationary solutions in multi-transonic pseudo-Schwarzschild accretion.

  78. Bagla J. S. and Prasad Jayanti 2006, MNRAS 370, 993, astro-ph/0601320 Effects of the size of cosmological N-Body simulations on physical quantities - I: Mass Function.

  79. Bagla J. S. and Ray Suryadeep 2006, Submitted to Mon.Not.Roy.Astron.Soc., astro-ph/0604598 Gravitational Clustering in Redshift Space: Non-Gaussian Tail of the Cosmological Density Distribution Function.

  80. Moscibrodzka Monika, Das Tapas K., Czerny Bozena 2006, Mon.Not.Roy.Astron.Soc. 370, 219, astro-ph/0604516 The pattern of accretion flow onto Sgr A*.

  81. Singha Subhendu B., Bhattacharjee J. K. and Ray Arnab K. 2005, European Physical Journal B 48, 417, condmat/0508388 Hydrolic jump in One-dimensional Flow.

  82. Ray Arnab K. and Bhattacharjee J. K. 2005, astro-ph/0511018, A dynamical systems approach to a thin accretion disc and its time-dependent behaviour on large length scales.

  83. Abraham H., Bilic N., and Das T. K. 2006, Class. Quant. Grav. 23, 2371, gr-qc/0509057 Acoustic horizons in axially symmetric relativistic accretion.

  84. Ray Arnab K. and Bhattacharjee J. K. 2005, ApJ 627, 368, astro-ph/0309259 Large scale properties in turbulent spherically symmetric accretion.

  85. Jassal H. K., Bagla J. S. and Padmanabhan T. 2005, Phys.Rev.D 72, 103503, astro-ph/0506748 Observational constraints on low redshift evolution of dark energy: How consistent are different observations?.

  86. Ray Suryadeep, Bagla J. S. and Padmanabhan T. 2005, MNRAS 360, 546, astro-ph/0410041 Gravitational Collapse in an Expanding Universe: Scaling Relations for Two-Dimensional Collapse Revisited.

  87. Bagla J. S., Prasad Jayanti and Ray Suryadeep 2005, MNRAS 360, 194, astro-ph/0408429 Gravitational collapse in an expanding background and the role of substructure I: Planar collapse.

  88. Sriramkumar L. and Padmanabhan T. 2005, Phys.Rev.D 71, 103512, gr-qc/0408034 Initial state of matter fields and trans-Planckian physics: Can CMB observations disentangle the two?

  89. Bagla J. S., Current Science 88, 1088 (Special section on cosmology, Guest editor T.Padmanabhan), astro-ph/0411043 Cosmological N-Body simulation: Techniques, Scope and Status.

  90. Bagla J. S. and Ray Suryadeep 2005, MNRAS, 358, 1076, astro-ph/0410373 Comments on the size of the simulation box in cosmological N-Body simulations.

  91. Sengupta S., Rao A. R., Dewangan G. C., Czerny B. and Das T. K. 2005, Submitted to Astrophysical Journal Letter Dramatic X-ray Spectral Variability in the Low-Luminosity Active Nucleus of NGC 4395: Flaring Accretion Disk or Shocked Accretion Flow?

  92. Gupta A.C. and Joshi U. C. 2005, A&A 440, 855, astro-ph/0505625 Intra-night Optical Variability of Luminous Radio Quiet QSOs.

  93. Dasgupta S., Bilic N. and Das T. K. 2005, Gen.Rel.Grav. 37, 1877, astro-ph/0501410 Pseudo-Schwarzschild Spherical Accretion as a Classical Black Hole Analogue.

  94. Fan J. H., Gupta A. C., et. al. 2005, Optical Variability of the Gamma-Ray Loud Blazar 4C 29.45: A possible 1.5-3.5 Year Periodicity.

  95. Jassal H. K., Bagla J. S. and Padmanabhan T. 2005, MNRAS Letters 356, L11, astro-ph/0404378 WMAP constraints on low redshift evolution of dark energy.

  96. Stalin C. S., Gupta A. C., Gopal-Krishna, Wiita P. J. and Sagar R., 2005, MNRAS 356, 607, astro-ph/0410056 Intra-night Optical Variability of BL Lacs, Radio-Quiet Quasars and Radio-Loud Quasars.

  97. Manickam Sivakumar G. 2004, Submitted to Astron. Astrophys, astro-ph/0410745 Stability of Accretion Disc around a Black Hole: effects of Bremsstrahlung and Synchrotron Cooling.

  98. Manickam Sivakumar G. 2004, Submitted to Mon. Not. Roy. Astron. Soc., astro-ph/0410713 Parameter Dependence of Transonic Accretion onto a Black Hole in the Presence of Bremsstrahlung and Synchrotron Cooling.

  99. Ray Suryadeep 2004, J. Astroph. Astron. 25, 103, astro-ph/0406009 TreePM Method for Two-Dimensional Cosmological Simulations.

  100. Ray Suryadeep and Bagla J. S. 2004, astro-ph/0405220, A Parallel TreePM Code.

  101. Gupta A. C., Banerjee D. P. K., Ashok N. M. and Joshi U. C. 2004, A&A 422, 505, astro-ph/0405186 Near infrared intraday variability of Mrk 421.

  102. Fan Jun-Hui, Kurtanidze O. M., Nikolashvili M. G., Gupta A. C., Zhang Jiang-Shui and Yuan Yu-Hai 2004, Chinese Journal of Astronomy & Astrophysics 4, 133 Optical Photometric Observations of Gamma-Ray Loud Blazars.

  103. Shankaranarayanan S. and Sriramkumar L. 2004, Phys.Rev. D 70, 123520, hep-th/0403236 Trans-Planckian corrections to the primordial spectrum in the infra-red and the ultra-violet.